Studio: Add prerendering? #11903

Nice visual idea, but each instance as an element! That uses a lot of resources to render.

Solution: So we could introduce an ability to "pre-render" the composition – it's gonna render as a video and we automatically replace it with a video at the call site. It's like flattening tracks in Ableton Live or pre-rendering in After Effects.

elements-promo-current-20261001-162832.zip